Effectiveness of Grass Filters in Reducing Phosphorus and Sediment Runoff
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Surface water contamination can often be reduced by passing runoff water through perennial grass filters. Research was conducted in 2006 to 2008 to evaluate the size of cool season grass filters consisting primarily of tall fescue (Festuca arundinacea Schreb) with some orchard grass (Dactylis glomerata L.) relative to drainage area size in reducing runoff sediment and phosphorus (P). The soil was Pohocco silt loam Typic Eutrochrepts with a median slope of 5.5 %. The grass filters occupying 1.1 and 4.3 % of the plot area were compared with no filter with four replications. The filters were planted in the V-shaped plot outlets which were 3.7 × 11.0 m in size. The filter effect on sediment and P concentration was determined from four natural runoff events when nearly all plots had runoff. Filter effect on runoff volume and contaminant load was determined using total runoff and composites of samples collected from 12 runoff events. Sediment concentration was reduced by 25 % with filters compared with no filter (from 1.10 to 1.47 g L−1), but P concentration was not affected. The 1.1 and 4.3 % filters, respectively, compared with having no grass filter, reduced: runoff volume by 54 and 79 %; sediment load by 67 and 84 % (357 to 58 kg ha−1); total P load by 68 and 76 % (0.58 to 0.14 kg ha−1); particulate P (PP) load by 66 and 82 % (0.39 to 0.07 kg ha−1); and dissolved reactive P (DRP) load by 73 and 66 % (0.2 to 0.07 kg ha−1), respectfully. A snowmelt runoff event had 56 % greater DRP concentration compared with rainfall-induced runoff events. Grass filters reduced sediment and P load largely by reducing runoff volume rather than reducing concentration. Well-designed and well-placed grass filters that occupy 1.0 to 1.5 % of the drainage area and intercept a uniform flow of runoff from a drainage area can reduce sediment and nutrient loss in runoff by greater than 50 %.
KeywordsSediment Grass filter Tall fescue Water quality
We are grateful to Dr. David Marx for advice in statistical analysis and to Mr. Mark Strnad for technical assistance in the fieldwork. This research was conducted under the USDA CSREES Managed Ecosystems project 2005-55101-16369.
- Abu-Zreig, M., Ruda, R. P., Whiteley, H. R., Lalonde, M. N., & Kaushik, N. K. (2003). Phosphorus removal in vegetated filter strip. Journal of Environmental Quality, 32, 613–619.Google Scholar
- Dillaha, T. A., Sherrard, J. H., & Lee, D. (1986). Long-term effectiveness and maintenance of vegetative filter strips. Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, Blacksburg Bulletin 153.Google Scholar
- Dillaha, T. A., Reneau, R. B., Mostaghimi, S., & Lee, D. (1989). Vegetative filter strips for agricultural nonpoint source pollution control. Transactions of ASAE, 32, 513–519.Google Scholar
- Dosskey, M. G., Helmers, M. J., Eisenhauer, D. E., Franti, T. G., & Hoagland, K. D. (2002). Assessment of concentrated flow through riparian buffers. Journal of Soil and Water Conservation, 57, 336–343.Google Scholar
- Dosskey, M. G., Hoagland, K. D., & Brandle, J. R. (2007). Changes in filter strip performance over ten years. Journal of Soil and Water Conservation, 62, 21–32.Google Scholar
- Flanagan, D. C., Foster, G. R., Neibling, W. H., & Burt, J. P. (1989). Simplified equations for filter strip design. Transactions of ASAE, 32, 2001–2007.Google Scholar
- Foster, G. R. (1982). Modeling the erosion process. 297–380. In C. T. Haan et al. (Eds.) Hydrologic modeling of small watersheds. ASAE Monographs No. 5. St. Joseph, MI.Google Scholar
- Gharabaghi, B., Rudra, R. P., Whiteley, H. R., & Dickingson, W. T. (2002). p. 289–302. In W. James (Ed.) Development of a management tool for vegetative filter strips. Best modeling practices for urban water systems. CHI Monograph 10, Guelph, Ontario, Canada.Google Scholar
- Gilley, J. E., Eghball, B., Kramer, L. A., & Moorman, T. B. (2000). Narrow grass hedge effects on runoff and soil loss. Journal of Soil and Water Conservation, 55, 190–196.Google Scholar
- Gitau, M. W., Gburek, W. J., & Jarrett, A. R. (2005). A tool for estimating best management practice effectiveness for phosphorus pollution control. Journal of Soil and Water Conservation, 60, 1–10.Google Scholar
- Haan, C. T., Barfield, B. J., & Hayes, J. C. (1994). Design hydrology and sedimentology for small catchments (p. 588). San Diego: Academic.Google Scholar
- Hayes, J. C., Barfield, B. J., & Barnhisel, R. I. (1984). Performance of grass filters under laboratory and field conditions. Transactions of ASAE, 27, 1321–1331.Google Scholar
- Helmers, M. J., Eisenhauer, D. E., Dosskey, M. G., & Franti, T. G. (2002). Modeling vegetative filter performance with VFSMOD. ASAE Meeting Paper No. MC02-308.Google Scholar
- Helmers, M. J., Isenhart, T. M., Dosskey, M., Dabney, S. M., & Strock, J. S. (2008). Buffers and vegetative filter strips. USDA Forest Service/UNL Faculty Publications. Paper 20. http://digitalcommons.unl.edu/usdafsfacpub/20.
- Jasen, T., Kevin, T., Esther, S., Andrea, K., & Don, N. (2011). Spring snowmelt impact on phosphorus addition to surface runoff in the Northern Great Plains. Better Crops/Vol. 95, No. 1)Google Scholar
- Magette, W. L., Brinsfield, R. B., Palmer, R. E., & Wood, J. D. (1989). Nutrient and sediment removal by vegetated filter strips. Transactions of ASAE, 32, 663–667.Google Scholar
- Nearing, M. A. (2004). Soil erosion and conservation. In Environmental modelling: Finding simplicity in complexity. Chichester: Wiley. ISBN 100-471-49618-9.Google Scholar
- Neibling, W. H., & Alberts, E. E. (1979). Composition and yield of soil particles transported through sod strips. ASAE Paper No. 79–2065. ASAE, St. Joseph, MI.Google Scholar
- Nighman, D., & Harbor, J. (1997). Trap efficiency of a storm water basin with and without baffles. Proceeding International Erosion Control Association, 28, 469–483.Google Scholar
- Olsen, S. R., & Sommers, L. E. (1982). Phosphorus. pp. 403–430. In A. L. Page, R. H. Miller, and D. R. Keeney (Eds.), Methods of soil analysis. 2nd ed. Agronomy Series No. 9, Part 2. Soil Science Society of America Journal, Madison, WI.Google Scholar
- Pote, D. H., & Daniel, T. C. (2000). Analyzing for dissolved reactive phosphorus in water samples. p. 91–93. In G. M. Pierzynski (Ed.), Methods of phosphorus analysis for soils, sediments, residuals, and waters. Southern Cooperative Series Bull. No. 396. SERA-IEG 17, USDA-CSREES Regional Committee.Google Scholar
- SAS Institute. (2003). The SAS system for Windows. Release 8.2. Cary: SAS Inst.Google Scholar
- Self-Davis, M. L., Moore, P. A., Daniel, T. C., Nichols, D. J., Sauer, T. J., West, C. P., et al. (2003). Forage species and canopy cover effects on runoff from small plots. Journal of Soil and Water Conservation, 58, 349–359.Google Scholar
- Tollner, E. W., Barfield, B. J., Vachirakornwatana, C., & Haan, C. T. (1977). Sediment deposition patterns in simulated grass filters. Transactions of ASAE, 20, 940–944.Google Scholar
- USDA-NRCS. (2002) Beef production best management practices (BMPs). Technical report. Pub. 2884. Available at http://hawaii.gov/hdoa/ai/ldc/Beef%20BMPs%20LSU%207-07.pdf . Accessed 13 May 2008.
- USEPA (2003). Nonpoint source pollution: The nation's largest water quality problem. USEPA, Office of Water. Available at http://www.epa.gov/owow/nps/facts/point1.htm. Accessed 23 April 2008.
- Wilson, L. G. (1967). Sediment removal from floodwater by grass filtration. Transactions of ASAE, 10, 35–37.Google Scholar